But surveillance is illegal, especially in a targeted form. Let me put it like this, your address is public, as people can see when you get in and out of your house. But now someone goes and tells someone else, a criminal, your address with the intention to cause you damages. That person, the informant, becomes directly an accomplice, even if the person didn’t do damage directly.
Well you are talking about 2 different things.
Stalking: just following a person for your own personal benefit.
And Spying/Surveillance: following someone to share the information with another entity or government.
The person in question had several logs and such logs were communicated to the chinese government, they have proof of this, so such actions are criminal offenses.